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CRISTINA: "People! What's with all the evil misery, huh? Live and let live."
GEORGE: [pause] "You're cheerful."
IZZIE: "You are. How is that possible?"
CRISTINA: "I scrubbed in on a four-hour esophageal surgery last night, then I got laid. And now, three ambulances are coming in full of bloody, broken car crash victims, all who need to be cut open. So I'm cheery, I'm cheery, I am so cheery! Cheery! I'm cheerful!"